Compressor



Dec. 14 1926- E. S. BRYANT COMPRESSOR Filed Dec. 15, 1924 I5 Sheets-Sheet 1 wuexntoz attorney! Dec. 14, 1926.

E. S. BRYANT COMPRESSOR F 'iled Dec. 15. 92 3 SheetsSh eet 2 llllllll Quorum;

Dec. 14, 3926.

- 1,610,600 E. s. BRYANT COMPRESSOR F'iled Dec. 15 1924 I5 Sheets-Sheet 5 snow Hex Pmatea Dec; 14, 1926.

UNITED STATES PATENT OFFICE- ELLSWORTE S. BRYANT, OF DETROIT, MICHIGAN, ASSIGNOR TO BRYANT PATTERN I AND MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF- MICHIGAN.

oomrnnsson.

Application filed December 1 1924. Serial No. 755,966.

.This invention relates to portable refrigerating plants employing the compression process of refrigeration, and more particularly to those adapted for household use where cheapness, compactness and ready firlzility of replacement of parts are desira e.

One of the objects of the said invention is to provide a simple and readily detachablt assembly of the refrigerant container in such a machine whereby the said container may be easily removed and replaced without interference with the other mechanisms of the machine. I

A further obiect is to provide a special form of valve for the compressor which is particularly applicable for controlling the passage of refrigerant gases through the compressor and is simple, cheap and positivein itsoperation.

A still further object is to provide a novel form of expansion coil having a base through which the cooling agent passes, and upon which vessels or articles to be cooled may be placed; and a still further object is toeiiect the returning of gas which may leak past the piston to the crank case-of the compressor back to the cylinder thereof.

Other obiects subsidiary to or resulting fromjhe aforesaid objects. or from the construction or operation of the invention as it may be carried into efiect, will become apparent as the. said invention is hereinafter furtherdisclosed.

In carrying the said invention into effect,

I may provide in a refrigerating machine a motor drlven compressor. a refrlgerant contamer or receiver, recelvlng discharge from said compressor and provided with a water cooling device, and an expansion coil connected to said receiver through a pressure reducing valve and to said compressor.

' The inlet and outlet valves of the com cylinder or cylinder head casting as the case may be, and the inlet of-th'e said compressor .is further provided with an auxiliary check; I

valve through which gases which may ha e leaked into the crank case 'of the compressor are drawn into the cylinder thereof and thereby returned to the term. 1

The expansion .coil is in the form of a base comprising a spirally wound coil, the outermost convolution of which is extended gas circulatory sysupwardly into ahelical coil having a 'diameter approximating that of the said outer convolution of the said base whereby the greater area of the said base is not subjected to drip from the helical portion of the said coil, and lends itself to use as a cooling table for receptacles or articles which may be placed thereon. The said receiver is connected with the several pipes leading thereto and therefrom by means'of a readily idetachable coupling, and is removable from such support as may be provided therefor, whereby it maybe readily removed and replaced.

All scribed and ascertained hereinaften'by way of. example, having reference to the accompanving drawing, wherein-- Figure 1 is an elevation of a refrigerating,

machine embodying the said invention;

Figure 2 is a section of the expansion coil taken onthe line 2" Figure 1;

Figure 3 is a plan of the said machine, the expansion coil being omitted;

Figure 4 is an end elevation of the same; Figure 5 is a transverse section through the machine taken on the line 5"5", Figure 3;

Figure 6 is a fragmentary sectional view of the cylinder of the compressor illustratin the valve mechanism; and

Figure 7 is a transverse section of the. same taken on the line 7" Figure 6.

Similar characters of reference indicate similar parts in the several figures of the drawing.

Mounted upon a support 1 is a'compressor 2 driven by a motor 3, and also mounted upon the said support is a tank or receiver 4 whichis provided with inlet and outlet connections 5 and 6 respectively, the said of which is more particularly de- 1 from which extends the inlet pipe 14 of the compressor, completing the gas circulatory system.

Within the said tank 4'is a cooling coil 15. the inlet 16 and outlet 17 of which extend through the bottom of the said tank and are coupled at 18 and'19 to the pipes 20 and 21. The pi e 20 leads from a shut off valve 22 with w ich a water connection 23 communieates, and which valve is controlled by a pressure-sensitive diaphragm device 24, which may be of any of the well known types, connected with the pipe line 7, 8.

The said tank enters a recess 25 in the support 1, and is secured in position by bolts 26 passing through ear pieces 27. Dismantling of the tank from the machine may be-quickly effected by 'the removal of the said bolts 26 and the uncoupling of couplings 18, 19, 28 and 29 as will be apparent; and it will be seenthat the connections 5 and 6 are in the form of shut-off valves 'so that-the uncoupling of the tank vmay be effected even though the tank may be filled with gas. Y

The pipe21 enters the water jacket 30 of the compressor so that the water discharged from the cooling coil of the said tank is further utilized for the cooling of' the compressor and is eventually discharged therefrom through the pipe 31.

The expansion coil 11 is indicated as having a base 32 which is of fiat spiral form, the body of the said expansion coil extending upwardly in helical form from the outer convolution of the said base so that the convolutions of the said body are approximate-.

lv superposed over the outer convolution of the saidvbase and the inner convolution of the said-baseis connected by the coupling 33 to the pipe 9. Thus the said baseis in the form of a trav which may be utilized for the support of water receptacles 53 or any other articles which it may be desired to place thereon, and any drip from the helical coils will'not fall upon the inner parts of the said tray so that it may be used for the reception of food stuffs which mav, if so-desired, extend upwardlv within the helical coil. Furthermore, with this arrangement the articlesto be cooled are placed directly upon the base of the coil so that the cooling thereof may be very rapidly effected and efficiently maintained.

The gas =from the ex ansion coil passes through the pipe 12 and receiver '13 to the cylinder of the compressor, and totake care of any leakage ofthe gas past the piston of the compressor, I have provided a pipe 34 which leads from the crank case through a check valve to the said receiver 13, so that any gas which may have so escaped into the crank-case may reenter the cylinder through the said check valve. I

An important feature of the said invention resides in the valves controllin passage of gases to and from the cylin er of thecompressor. It will be seen that each of these valves comprises a bushing 36 havin a ground and hardened seat 37 upon whic rests a valve disk 38, which is stemless, being simply in the form of a flat plate, the edge of which is notched at 39 to permit the passage of gas therearound when the valve is open, and 40 is the spring which yieldably retains the said valve upon its seat.

For the accommodation of the seat end of the bushing the valve disk and its spring, the casting into which these parts extend, is suitably bored to form a housing as at 41 in the case of the inlet valve and 42 in the case of the exhaust valve, so. that the said valves are contained within the castings forming the upper part of the cylinder and are quite close to the bore of the cylinder.

Consequently, the inlet and exhaust passages 43 and 44"are comparatively short and as in this case the piston of the compressor rises almost into contact with the head of the cylinder. the exhausting of the compressor 1 on the discharge stroke of the piston is always complete and great efiiciency is thereby secured, there being very little gas pocketed in the compressor immediately prior to the inlet stroke. 7

It will be observed that the nature and application of the said valves is extremely simple and successfully avoids a complicity of fixtures or attachments to the cylinder, the said valve being simply housed at the junction between the cylinder walls of the eylin- I der head.

' The apparatus described has been found in actual practice to give excellent results in refrigeration. and to be capable of easy interchangeability of parts so that for household use and small refrigerating plants it meets the many requirements of'such devices and may be constructed at a cost compatible with its use in small household installations.

This inyention may be developed within the scope of the following claims, without departing from the essential features of the said invention, and it is desired that the specification and drawing be read as merely illustrativeand not in a limiting sense, ex cent as necessitated by the prior art.

What I claim is 1. In a compressor, a cylinder casting, a cylinder head casting, inlet and outlet valves, each of said valves comprising a bushing, a disk and a spring, said bushing being accommodated in one of said castings and said disk and spring in the other of said castings. i

2. In a compressor, a ported cylinder cast- 5 ing, a ported cylinder head casting, a bushing threaded into one of said castings and extending into a recess in the other of said castings with which its port communicates a disk valve in said recess seating on said bushing, and a spring also in said recess 10 yieldingly retaining said disk valve seated.

In testimony whereof I affix my signature.

, ELLSWORTH S. BRYANT. 

